Just curious, but why is the Sun Room actually called the Sun Room? Does it have a sun roof or something?

If anyone had told me that switching from night shift to day would smack me down this bad, I would have thought them lying. Geez. Anyways, yes, work is finally under control, and I apologize for my lateness on entering the sun room.

So, are the patient's rooms locked with the patients inside?  Say, if a patient wakes up before the nurse comes to pick them up, and they tried the door would it be locked?  I'd think it would be for security purposes, especially with a more rebellious/violent patient, but if that's the case, what if the patient has to use the bathroom or needs medical help or some such?  Is there a kind of ring-for-nurse system going on?